[9610][ERD] drivers: muic: fix prevent CID 237155

[9610][ERD] drivers: muic: fix prevent CID 237155

- Fix problem of dereference before null check.
- System comment:

1579 static irqreturn_t s2mu004_muic_detach_isr(int irq, void *data)
1580 {
1581         struct s2mu004_muic_data *muic_data = data;
		/* deref_ptr: Directly dereferencing pointer muic_data. */
1582        struct muic_platform_data *muic_pdata = muic_data->pdata;
1583        struct muic_interface_t *muic_if = muic_data->if_data;
1584
		/* CID 237155 (#1 of 1): Dereference before null check (REVERSE_INULL)
		 * check_after_deref: Null-checking muic_data suggests that it may be null,
		 * but it has already been dereferenced on all paths leading to the check.
		 */
1585        if (muic_data == NULL || muic_pdata == NULL || muic_if == NULL) {
1586                pr_err("%s, data NULL\n", __func__);
1587                return IRQ_NONE;
1588        }

Change-Id: I6cb3128153c8a062fdd141a39abd87607ec29f15
Signed-off-by: Kim Taejeong <tj.kim@samsung.com>